Fluorescence Lymph Node Mapping for Colon Cancer Surgery

Inclusion Criteria: 1. Patients who over 19 years old, Under 85 years old 2. Patient with locally advanced right colon cancer requiring D3 lymphadenectomy 3. Colon cancer patients diagnosed with clinical stage cT3-4 N0 or cTany N1-2 before surgery 4. Patient with right-sided colon cancer located in the cecum, ascending colon, flexure colon, and proximal transverse colon. 5. Patients with American Society of Anesthesiology (ASA) I-III 6. Patients who agreed to the research purpose and voluntarily gave informed consent Exclusion Criteria: 1. Patients with a history of allergy or side effects to sodium iodine 2. Patients with colon cancer who have distant or peritoneal metastases 3. Patients requiring emergency surgery due to colon obstruction or colon perforation 4. Patients with inflammatory bowel disease not controlled by drug treatment 5. Patients with concurrent cancer in other areas other than colon cancer 6. Patients with a history of hereditary disease or coagulopathy at risk of bleeding 7. Women who are pregnant or may be pregnant and lactating women 8. Patients with chronic renal failure (e-GFR \< 15) or patients receiving dialysis at the time of screening 9. Patients diagnosed with liver failure or with decreased consciousness due to hepatic encephalopathy 10. Patients judged to have difficulty in smooth lymph perfusion due to heart disease (acute myocardial infarction, acute and chronic heart failure) within the past 6 months 11. Patients unable to undergo general anesthesia 12. Patients with American Society of Anesthesiology (ASA) IV or V 13. Patients who do not wish to participate in this study 14. Patients who are judged by the researcher to be unsuitable for participation in this clinical trial (Example: People with a life expectancy of less than 6 months, people expected to have low compliance with clinical trials, etc.)